182 citations · 300 across the 14 of their papers we have counts for
5 papers · 1 filter
Estimation of equilibration time scales from nested fraction approximations
Christian Bartsch, Anatoly Dymarsky, Mats H. Lamann +3
We consider an autocorrelation function of a quantum mechanical system through the lens of the so-called recursive method, by iteratively evaluating Lanczos coefficients, or solvin…
Relaxation of dynamically prepared out-of-equilibrium initial states within and beyond linear response theory
Jonas Richter, Mats H. Lamann, Christian Bartsch +2
We consider a realistic nonequilibrium protocol, where a quantum system in thermal equilibrium is suddenly subjected to an external force. Due to this force, the system is driven o…
Necessity of eigenstate thermalization for equilibration towards unique expectation values when starting from generic initial states
Christian Bartsch, Jochen Gemmer
We investigate dynamical equilibration of expectation values in closed quantum systems for realistic non-equilibrium initial states. Thereby we find that the corresponding long tim…
Occurrence of exponential relaxation in closed quantum systems
Christian Bartsch, Robin Steinigeweg, Jochen Gemmer
We investigate the occurrence of exponential relaxation in a certain class of closed, finite systems on the basis of a time-convolutionless (TCL) projection operator expansion for…
Statistical Relaxation in Closed Quantum Systems and the Van Hove-Limit
Christian Bartsch, Pedro Vidal
We analyze the dynamics of occupation probabilities for a certain type of design models by the use of two different methods. On the one hand we present some numerical calculations…